/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:37:23,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:37:23,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:37:23,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:37:23,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:37:23,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:37:23,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:37:23,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:37:23,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:37:23,362 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:37:23,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:37:23,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:37:23,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:37:23,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:37:23,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:37:23,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:37:23,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:37:23,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:37:23,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:37:23,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:37:23,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:37:23,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:37:23,374 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:37:23,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:37:23,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:37:23,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:37:23,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:37:23,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:37:23,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:37:23,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:37:23,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:37:23,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:37:23,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:37:23,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:37:23,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:37:23,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:37:23,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:37:23,398 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:37:23,398 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:37:23,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:37:23,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:37:23,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:37:23,645 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:37:23,645 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:37:23,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-06 08:37:23,700 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5cfcc229/7de05902435b4a5b9ff85e32e3ce3e4d/FLAGf53fd5d82 [2021-05-06 08:37:24,073 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:37:24,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c [2021-05-06 08:37:24,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5cfcc229/7de05902435b4a5b9ff85e32e3ce3e4d/FLAGf53fd5d82 [2021-05-06 08:37:24,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5cfcc229/7de05902435b4a5b9ff85e32e3ce3e4d [2021-05-06 08:37:24,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:37:24,103 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:37:24,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:37:24,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:37:24,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:37:24,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,112 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ca6bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24, skipping insertion in model container [2021-05-06 08:37:24,112 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:37:24,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:37:24,364 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c[525,538] [2021-05-06 08:37:24,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:37:24,386 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:37:24,396 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_valuebound2.c[525,538] [2021-05-06 08:37:24,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:37:24,440 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:37:24,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24 WrapperNode [2021-05-06 08:37:24,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:37:24,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:37:24,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:37:24,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:37:24,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,470 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:37:24,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:37:24,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:37:24,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:37:24,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:37:24,549 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:37:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:37:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:37:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:37:24,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:37:24,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:37:24,801 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:37:24,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:37:24 BoogieIcfgContainer [2021-05-06 08:37:24,802 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:37:24,803 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:37:24,803 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:37:24,803 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:37:24,805 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:37:24" (1/1) ... [2021-05-06 08:37:24,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:37:24 BasicIcfg [2021-05-06 08:37:24,813 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:37:24,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:37:24,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:37:24,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:37:24,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:37:24" (1/4) ... [2021-05-06 08:37:24,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4a1163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:37:24, skipping insertion in model container [2021-05-06 08:37:24,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:37:24" (2/4) ... [2021-05-06 08:37:24,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4a1163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:37:24, skipping insertion in model container [2021-05-06 08:37:24,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:37:24" (3/4) ... [2021-05-06 08:37:24,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4a1163 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:37:24, skipping insertion in model container [2021-05-06 08:37:24,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:37:24" (4/4) ... [2021-05-06 08:37:24,818 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_valuebound2.cJordan [2021-05-06 08:37:24,821 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:37:24,824 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:37:24,834 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:37:24,845 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:37:24,845 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:37:24,845 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:37:24,846 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:37:24,846 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:37:24,846 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:37:24,846 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:37:24,846 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:37:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:37:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:37:24,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:37:24,858 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:37:24,858 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:37:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:37:24,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1141493127, now seen corresponding path program 1 times [2021-05-06 08:37:24,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:37:24,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392311743] [2021-05-06 08:37:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:37:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:24,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:37:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:25,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:37:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:25,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:37:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 08:37:25,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:37:25,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392311743] [2021-05-06 08:37:25,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392311743] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:37:25,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:37:25,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:37:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563787605] [2021-05-06 08:37:25,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:37:25,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:37:25,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:37:25,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:37:25,028 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:37:25,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:37:25,075 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-05-06 08:37:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:37:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:37:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:37:25,081 INFO L225 Difference]: With dead ends: 29 [2021-05-06 08:37:25,081 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 08:37:25,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:37:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 08:37:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 08:37:25,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:37:25,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-05-06 08:37:25,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 23 [2021-05-06 08:37:25,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:37:25,104 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-05-06 08:37:25,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:37:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-05-06 08:37:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 08:37:25,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:37:25,105 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:37:25,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:37:25,106 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:37:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:37:25,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1441395781, now seen corresponding path program 1 times [2021-05-06 08:37:25,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:37:25,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065434213] [2021-05-06 08:37:25,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:37:25,122 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:37:25,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1998750565] [2021-05-06 08:37:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:37:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:25,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:37:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:37:25,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:37:25,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:37:25,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065434213] [2021-05-06 08:37:25,344 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:37:25,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998750565] [2021-05-06 08:37:25,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998750565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:37:25,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:37:25,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:37:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468720133] [2021-05-06 08:37:25,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:37:25,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:37:25,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:37:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:37:25,346 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:37:25,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:37:25,415 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 08:37:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:37:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 08:37:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:37:25,416 INFO L225 Difference]: With dead ends: 32 [2021-05-06 08:37:25,416 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 08:37:25,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:37:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 08:37:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 08:37:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:37:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-05-06 08:37:25,420 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 23 [2021-05-06 08:37:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:37:25,421 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-05-06 08:37:25,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 08:37:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-05-06 08:37:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 08:37:25,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:37:25,422 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:37:25,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:37:25,641 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:37:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:37:25,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2044378429, now seen corresponding path program 1 times [2021-05-06 08:37:25,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:37:25,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720764041] [2021-05-06 08:37:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:37:25,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:37:25,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246599514] [2021-05-06 08:37:25,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:37:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:37:25,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:37:25,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:37:25,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:37:25,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:37:25,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720764041] [2021-05-06 08:37:25,843 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:37:25,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246599514] [2021-05-06 08:37:25,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246599514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:37:25,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:37:25,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:37:25,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428006328] [2021-05-06 08:37:25,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:37:25,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:37:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:37:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:37:25,844 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:37:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:37:25,938 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 08:37:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:37:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2021-05-06 08:37:25,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:37:25,939 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:37:25,939 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:37:25,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:37:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:37:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:37:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:37:25,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-06 08:37:25,943 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2021-05-06 08:37:25,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:37:25,944 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-06 08:37:25,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 08:37:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-06 08:37:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:37:25,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:37:25,945 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:37:26,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:37:26,162 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:37:26,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:37:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1793299131, now seen corresponding path program 2 times [2021-05-06 08:37:26,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:37:26,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768596424] [2021-05-06 08:37:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:37:26,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:37:26,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421234111] [2021-05-06 08:37:26,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:37:26,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:37:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:37:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 08:37:26,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:37:26,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:37:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-06 08:37:26,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:37:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768596424] [2021-05-06 08:37:26,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:37:26,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421234111] [2021-05-06 08:37:26,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421234111] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:37:26,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:37:26,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 08:37:26,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135543589] [2021-05-06 08:37:26,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:37:26,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:37:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:37:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:37:26,440 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:37:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:37:26,477 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-06 08:37:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:37:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 08:37:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:37:26,479 INFO L225 Difference]: With dead ends: 28 [2021-05-06 08:37:26,479 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:37:26,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:37:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:37:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:37:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:37:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:37:26,481 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2021-05-06 08:37:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:37:26,484 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:37:26,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 08:37:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:37:26,485 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:37:26,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:37:26,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:37:26 BasicIcfg [2021-05-06 08:37:26,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:37:26,707 INFO L168 Benchmark]: Toolchain (without parser) took 2604.40 ms. Allocated memory was 189.8 MB in the beginning and 245.4 MB in the end (delta: 55.6 MB). Free memory was 155.0 MB in the beginning and 199.6 MB in the end (delta: -44.6 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,707 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:37:26,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 189.8 MB. Free memory was 154.8 MB in the beginning and 173.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,711 INFO L168 Benchmark]: Boogie Preprocessor took 48.82 ms. Allocated memory is still 189.8 MB. Free memory was 173.9 MB in the beginning and 172.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,711 INFO L168 Benchmark]: RCFGBuilder took 310.83 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,711 INFO L168 Benchmark]: IcfgTransformer took 11.03 ms. Allocated memory is still 189.8 MB. Free memory was 157.5 MB in the beginning and 156.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,711 INFO L168 Benchmark]: TraceAbstraction took 1892.34 ms. Allocated memory was 189.8 MB in the beginning and 245.4 MB in the end (delta: 55.6 MB). Free memory was 155.7 MB in the beginning and 199.6 MB in the end (delta: -43.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:37:26,717 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 189.8 MB. Free memory is still 171.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 333.66 ms. Allocated memory is still 189.8 MB. Free memory was 154.8 MB in the beginning and 173.9 MB in the end (delta: -19.1 MB). Peak memory consumption was 14.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.82 ms. Allocated memory is still 189.8 MB. Free memory was 173.9 MB in the beginning and 172.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 310.83 ms. Allocated memory is still 189.8 MB. Free memory was 171.8 MB in the beginning and 157.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.03 ms. Allocated memory is still 189.8 MB. Free memory was 157.5 MB in the beginning and 156.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1892.34 ms. Allocated memory was 189.8 MB in the beginning and 245.4 MB in the end (delta: 55.6 MB). Free memory was 155.7 MB in the beginning and 199.6 MB in the end (delta: -43.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1859.5ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 8.8ms, AutomataDifference: 273.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 87 SDtfs, 55 SDslu, 271 SDs, 0 SdLazy, 174 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 144.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 199.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=3, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 20.9ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.7ms SsaConstructionTime, 95.3ms SatisfiabilityAnalysisTime, 544.8ms InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 363 SizeOfPredicates, 7 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 26/35 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...